Method for reducing geometric deviations caused due to reconstruction of three-dimensional image data set of patient, involves determining corrected projection images by applying geometric errors to distortion of original projection images

摘要

The method involves determining displacement information by comparing projection images (3) and comparison images (8) or comparison coordinates for different points for comparison in a spatially-resolved projection surface. Corrected projection images are determined by applying geometric errors describing the displacement information to distortion of the original projection images with respect to a salient structure located in an intermediate image record (6) in a corresponding projection direction. The displacement information is a displacement vector field. The projection images are X-ray projection images. The salient structures are both anatomical markers. An independent claim is also included for an X-ray device.